linux-kernel - RE: [PATCH v2] fs/select: add vmalloc fallback for select(2)

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Message-ID: <063D6719AE5E284EB5DD2968C1650D6DB0107FEB@AcuExch.aculab.com>
Date:   Fri, 23 Sep 2016 13:35:52 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Vlastimil Babka' <vbabka@...e.cz>,
        Eric Dumazet <eric.dumazet@...il.com>
CC:     Alexander Viro <viro@...iv.linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        Michal Hocko <mhocko@...nel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Linux API <linux-api@...r.kernel.org>,
        "linux-man@...r.kernel.org" <linux-man@...r.kernel.org>
Subject: RE: [PATCH v2] fs/select: add vmalloc fallback for select(2)

From: Vlastimil Babka
> Sent: 23 September 2016 10:59
...
> > I suspect that fdt->max_fds is an upper bound for the highest fd the
> > process has open - not the RLIMIT_NOFILE value.
> 
> I gathered that the highest fd effectively limits the number of files,
> so it's the same. I might be wrong.

An application can reduce RLIMIT_NOFILE below that of an open file.

	David